COPEPOD PARASITES AND MUSSEL GLOCHIDIA ON FRESH-WATER FISHES. 355 

 Argulus versicolor Wilson. 



Arffxdus -versicolor Wilson, Proc. U. S. Nat. Mus., vol. 25. p. 716, pi. 20; vol. 27, p. 643, fig. 22-33, text. 



Host and record of specimens. — This species was originally obtained from the common pickerel, 

 Esox lucius, at Warren, Mass. It was also found at other localities in the same State. A male and 

 female were taken from the same host at Lake Maxinkuckee, Ind., August 15, 1906. 



Remarks. — The single pair above mentioned are the only specimens of this species thus far found 

 in the Mississippi Valley, but the host is one of the most widely distributed fish in America and other 

 specimens should be discovered in the future. They are usually found inside the mouth or in the gill 

 cavity and not on the outside surface . 



Argulus catostomi Dana and Herrick. 



Argulus catostomi Dana and Herrick, Amer. Jour. Sci., vol. 31, p. 297, unnumbered plate; Wilson, Proc. U. S. Nat. Mus., 

 vol. 25, p. 709, pi. 13; vol. 32, p. 411, pi. 29. 



Host and record of specimens. — This species was originally fotind upon a sucker near New Haven, 

 Conn. It was taken by the present author from Caiostomus bosionensis in Massachusetts, and from 

 C. catostomus at Lake Maxinkuckee, Ind., and from C. nigricans and C. caiostomus in the Missequoi 

 River at Swanton, Vt. The Maxinkuckee specimens have been given catalogue no. 32820, U. S. National 

 Musei'm. 



Remarks. — Only one or two suckers were taken during the summer of 1914 and no specimens were 

 found upon them, but the species is in the valley and is probably as widely distributed as its host. 



Argulus americanus Wilson. 



Argulus americanus Wilson. Proc. U. S. Nat. Mus., vol. 25, p. 718, pi. 21; vol. 27, p. 627, fig. 1-21, text. 



Host and record of specimens. — Originally obtained by Prof. Reighard from .Amia calva in the labo- 

 ratory aquaria at Ann Arbor, Mich., this species was afterward fotmd on the same host at Lake Maxin- 

 kuckee, Ind. (catalogue no. 32825, U. S. National Museum), and at Fairport, Iowa, August 26, 1912 

 (catalogue no. 43601, U. S. National Museum), and on Umbra limi in one of the aquaria at Fairport, 

 Iowa, February 7, 1911 (catalogue no. 43529, U. S. National Museum). 



Remarks. — This species is a great aquarium pest and thus is more likely to attract notice than some 

 of the othe/s. It is widely distributed throughout the valley but fortunately sticks closely to the dogfish 

 for a host. Its presence on the mud minnow as above recorded was probably only temporary, and appar- 

 ently it does not infest other fish . 



Both sexes of the adults and the larvse are fully described and figured in the references given above. 



Aigulus trilineatus Wilson. 



Argulus trilineata Wilson, Proc. U. S. Nat. Mus., vol. 27, p. 651, fig. 34-38, text. 



Host and record of specimens. — The type was a female taken from goldfish in an aquarium at Macon, 

 Ga. Another female was obtained by L. V. Lewis in a bowl of goldfish at Henderson, Ky., October 

 30, 1914, and sent to the National Museum for identification. It was afterward returned to Mr. Lewis. 



Remarks. — In the reference given above the specific name ended in the letter "a" through an 

 oversight of the author; it should end in "us" so as to agree with the genus name, and that change is 

 here made. 



It was gratifying to obtain a second specimen from Kentucky and thus to know that the species 

 was a valid one and quite widely distributed. This latter location comes within the range of the present 

 paper and so the species is here included. 



Argulus funduli Kr0yer. 



Arffutus funduli Kr^yer, Natiu-historisk Tidsskrift, 3 Raekke, 2 bd., p. 92. 



Host and record of specimens. — Kr0yer found this species on the gills of a species of Fundulus near 

 New Orleans. While this brings it into the Mississippi River, its host is a marine or brackish-water 

 fish, and hence the parasite does not rightly belong among the fresh-water forms. The present author 

 has found it repeatedly at Beaufort, N. C, and at Woods Hole, Mass., but always in salt water. 



